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Showing black screen Troubleshoot # 5 · Switch off your television and unplug the power supply · Then You need to Hold Tv's power button for 20 seconds · Now, 1. Hisense TV does not turn on · The first thing you need to check is the remote control batteries. · Then try turning on the TV using the switch behind the TV. Some of the common symptoms of Hisense TV malfunctions include flickering, dimming, buzzing sound, no picture display, and distorted pictures. If you notice Check the volume settings. Check if Mute mode is set "on". If black and white picture first unplug TV from AC outlet and replug after 60 seconds. Check Color